The heaters stopped and never came back on, this was in the summer so of course I left it untill it got cold... But now Its freezing I need to fix them, I've done the usual bridged 1 - 5 on the resistor pack, heaters fire up flat out with no control over the speed, which leads me to think it's a resistor pack, I've tried several packs and A control panel, along with th scuttle wiring for heater system, help is much appreciated!